[NewCandle] NR attempt at Fred's battery anti-lifter

[Nick Reiter]

Hi Horace, et al

The experiments in which we had looked at "sum of the
units" weight being more or less than the aggregate
was limited to coils of copper wire (mainly plastic
jacketed zipcord and magnet wire) coils wound in
oddball geometries, per Sam Faile's coil work.  It was
a fun and unique set of tests, though chock full of
potential artifacts.  What I wrote up on it can still
be found here:

http://www.geocities.com/spfaile/ArrayGrav.html

I think the mechanism by which cloth or paper would
change weight with acquisition of H2O from the air
would more likely be simply surface trapping rather
than swelling and air displacement.  Or evaporation
from high surface areas depending on changes in
ambient relative humidity.  The volumetric swelling
and displacement effect could certainly exist in some
materials, agreed.

N


--- Horace Heffner <hheffner at mtaonline.net> wrote:

> 
> On Aug 13, 2007, at 12:29 PM, Nick Reiter wrote:
> 
> 
> >
> > Back in the day, I had done some experiments with
> Sam
> > Faile that involved me weighing all individual
> > components in an isolated fashion, then putting
> them
> > together in the final "cluster" or arrangement.
> > Sometimes the sum of the parts was more or less
> than
> > the aggregate.
> 
> I'll try to get this right this time.
> 
> If dissolving things (or a chemical reaction is
> involved resulting in  
> a solute, like copper chloride) is part of that
> process then the  
> scale weight is likely to change.  The volume of a
> solvent and solute  
> is often less after solvation than before, but the
> mass is the same,  
> and the density increases.  What changes is the
> total air displaced  
> is reduced, so the resulting solution appears to
> have "gained  
> weight". The amount of gained weight can then
> hopefully be accounted  
> for by measuring the before and after volumes and
> then multiplying  
> the lost volume by the density of air to obtain the
> loss of  
> buoyancy.  That loss of buoyancy makes the aggregate
> mass appear  
> heavier.
> 
> How about the effect of water when absorbed into
> some fibers? The  
> fibers swell up by more than the volume of the added
> water, and thus  
> displace more air. The object appears to get
> lighter.
> 
> Horace Heffner
> http://www.mtaonline.net/~hheffner/
> 
> 
> 
> 
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